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Postings from June 2012
On Fri, Jun 22, 2012 at 7:55 PM, Tom Christiansen <tchrist@perl.com> wrote:
> > $ perl -E'@. = qw( a b c ); say "@{.}"'
>
> abc
>
>
What's up with *#4*? How in the world is dot a legal
> name inside braces without quotes around it?
>
This isn't a dereference, this is Perl's interpolation delimiter.
That's why C<< "${foo}" >> is allowed with strict on.
That's why C<< "${Mod::foo}" >> is allowed.
That's why C<< "${.}" >> is allowed.
>perl -wE"use strict; my $foo=123; say qq{${foo}x}
123x
>perl -wE"use strict; our $foo=123; say qq{${main::foo}x}
123x
>perl -wE"use strict; say qq{${$}x}
5884x
Whoa, it's also allowed outside of a literal!
>perl -wE"use strict; my $foo=123; say ${foo}
123
>perl -wE"use strict; our $foo=123; say ${main::foo}
123
>perl -wE"use strict; say ${$}
5884
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